[libvirt] RFC: a <uuid> for every <interface> in each domain

[Daniel P. Berrange]

On Wed, Aug 15, 2012 at 11:05:10AM -0600, Eric Blake wrote:
> On 08/15/2012 10:27 AM, Laine Stump wrote:
> > A couple of situations have come up recently that could be solved by
> > every interface in every domain always having a unique identifier
> > associated with it:
> > 
> 
> > 
> > Does this sound like a reasonable idea? Any reasons *not* to do it?
> 
> I think the idea makes sense.
> 
> > Problems we'll need to take care of if we add it (for example, existing
> > guest interfaces will all need to get a uuid during the upgrade process,
> > similar to the way we add a mac address to all existing networks that
> > don't have one). Any other things you can think of doing with uuid if we
> > add one?
> 
> I'm worried about how it gets added.  Adding it to src/datatypes.h
> virInterfacePtr would be most similar to how we do things for other
> objects with a UUID (virDomainPtr, virNetworkPtr, virStoragePoolPtr,
> virSecretPtr, virNWFilterPtr), but touching datatypes.h is a huge pain
> because it would be an ABI break.  How do we keep RPC protocol sane
> without passing the UUID around, but client and server are still always
> referring to the same object?

virInterfacePtr  != <interface> in domain XML, so this isn't an issue


Daniel
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